Answer: 12 weeks
Step-by-step explanation:
sales tax= $74.17
$74.17 + $899 = $973.17
that's how much you need
you're saving 15% of your weekly pay of $565
15% of $565 = $84.75
so, you save $84.75 each week
$973.17 divided by $84.75 = 12 (rounded to nearest whole number)
so, it will take you about 12 weeks to save enough to buy the iPhone